Patents by Inventor Kazuya Hiratsuka
Kazuya Hiratsuka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5888673Abstract: An organic electrolyte cell comprising an organic electrolyte and an anode and/or a cathode of a carbonaceous material of a heat-treated material of an aromatic condensation polymer having a specific surface area of at least 1,500 m.sup.2 /g measured by BET method, wherein a solvent in the electrolyte is a mixed solvent containing a chain-like carbonate of the formula R.sup.1 OC(.dbd.O)OR.sup.2 (wherein R.sup.1 and R.sup.2 are monovalent organic groups which may be the same or different) and sulfolane or its derivative.Type: GrantFiled: July 8, 1997Date of Patent: March 30, 1999Assignee: Asahi Glass Company Ltd.Inventors: Takeshi Kawasato, Kazuya Hiratsuka, Takeshi Morimoto, Manabu Tsushima, Manabu Suhara
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Patent number: 5795680Abstract: A non-aqueous electrolyte type secondary battery comprises a negative electrode capable of occluding and releasing lithium, a positive electrode capable of occluding and releasing lithium, a non-aqueous electrolyte which contains a lithium salt, and a container for accommodating the negative electrode, the positive electrode, and the electrolyte. The negative electrode is formed by pressing a foam metal or a fibrous sintered metal which contains nickel as a principal component thereof and which is filled with a mixture of a binder and a carbon material capable of occluding and releasing lithium. The negative electrode has a thickness of not less than 0.1 mm and a porosity of 20 to 50%.Type: GrantFiled: November 29, 1996Date of Patent: August 18, 1998Assignees: Asahi Glass Company Ltd., Elna Company Ltd.Inventors: Katsuji Ikeda, Kazuya Hiratsuka, Takeshi Morimoto, Shinji Matsumoto
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Patent number: 5754393Abstract: An electric double layer capacitor which includes a polarization electrode and an electrolyte capable of forming an electric double layer on the surface of the polarization electrode, wherein the solvent in the electrolyte is an organic type mixed solvent containing sulfolane or a sulfolane derivative, and a chain carbonic acid ester represented by the general formula R.sup.1 O(CO)OR.sup.2 (wherein R.sup.1 and R.sup.2, which may be the same or different, are monovalent organic groups).Type: GrantFiled: February 23, 1996Date of Patent: May 19, 1998Assignee: Asahi Glass Company Ltd.Inventors: Kazuya Hiratsuka, Takeshi Kawasato, Manabu Suhara, Katsuji Ikeda, Karl Ludger Neumann, Takeshi Morimoto
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Patent number: 5604426Abstract: An electric apparatus with a power supply including a electric double layer capacitor capable of being charged in a short time and supplying a constant electric power with a high power efficiency, and in a peak load type electric apparatus such as an electric automobile, a long time small power output and a short time large power output can be derived as required. For a constant load type electric apparatus, electric power is supplied from an electric double layer capacitor of a power supply, and is stabilized to a constant voltage by a switching regulator, and for a peak load type electric apparatus, a power supply is made by connecting a first electric double layer capacitor of a high energy density type to a second electric double layer capacitor of a high power density type via a current output type switching regulator, and the second capacitor is charged with electric power in the first capacitor through the switching regulator.Type: GrantFiled: June 27, 1994Date of Patent: February 18, 1997Assignees: Asahi Glass Company Ltd., Okamura Laboratory Inc., Elna Company Ltd.Inventors: Michio Okamura, Takeshi Morimoto, Kazuya Hiratsuka
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Patent number: 5578377Abstract: A coating solution for forming a colored thin film, which contains a metal oxide containing nitrogen.Type: GrantFiled: April 21, 1994Date of Patent: November 26, 1996Assignee: Asahi Glass Company Ltd.Inventors: Takeshi Morimoto, Kazuya Hiratsuka, Yasuhiro Sanada, Keiko Ohashi, Keisuke Abe, Takeshi Kawasato
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Patent number: 5545933Abstract: An electric power storage apparatus is formed of a plurality of series-connected cells to obtain a desired working voltage, each of the cells being constituted by one electric double-layer capacitor or a plurality of electric double-layer capacitors connected. The plurality of cells are series-connected so that the combined withstanding voltage is not lower than Vr+Vs where Vr represents the working voltage of the cells and Vs represents the withstanding voltage of one of the cells. The apparatus further includes connectors for detachably holding each of the cells respectively, and a circuit in which a diode is connected in parallel to each of the cells, so that a failed one of the cells can be detached and replaced by a new one while the working voltage of the cells is kept within a tolerance limit.Type: GrantFiled: September 27, 1994Date of Patent: August 13, 1996Assignees: Okamura Laboratory Inc., ELNA Company Ltd., Asahi Glass Company Ltd.Inventors: Michio Okamura, Takeshi Morimoto, Kazuya Hiratsuka
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Patent number: 5498951Abstract: Method and apparatus for quickly and efficiently charging an electric double layer capacitor. The capacitor is charged by a constant-current power supply which is preferably a current controlled output type switching power supply. To cause the voltage across the terminals of the capacitor to reach its working voltage in a short time, the capacitor is overcharged for a short time. Where the capacitor is charged with a solar battery, a constant-current output type switching regulator is interposed between the solar battery and the capacitor.Type: GrantFiled: June 30, 1994Date of Patent: March 12, 1996Assignee: JEOL Ltd.Inventors: Michio Okamura, Takeshi Morimoto, Kazuya Hiratsuka
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Patent number: 5482768Abstract: A surface-treated substrate consisting essentially of a substrate having at least two treated surface layers wherein the first layer constituting the outermost layer among the treated surface layers is a layer formed by treating with a treating agent containing a compound (I) capable of forming a surface having a contact angle of at least 70.degree. against water, and the second layer constituting an underlayer in contact with the outermost layer is a thin film layer of a heat resistant polymer formed by treating with a treating agent containing a compound (II) capable of forming a thin film of a heat resistant polymer and fine particles of a polymer, to form a thin film and heating the thin film to thermally decompose the fine particles of a polymer.Type: GrantFiled: May 13, 1994Date of Patent: January 9, 1996Assignee: Asahi Glass Company Ltd.Inventors: Takeshi Kawasato, Kazuya Hiratsuka, Takashige Yoneda, Tsuneo Wakabayashi, Fumiaki Gunji
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Patent number: 5480722Abstract: A ultraviolet ray absorbent glass comprises a substrate glass, a ultraviolet ray absorbent film including as the major component at least one selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, and an intermediate film having an intermediate refractive index which is between the refractive indices of the ultraviolet absorbent film and the substrate glass, the intermediate film being located between the ultraviolet absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted.Type: GrantFiled: June 30, 1993Date of Patent: January 2, 1996Assignee: Asahi Glass Company Ltd.Inventors: Hiroyuki Tomonaga, Takeshi Morimoto, Kazuya Hiratsuka
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Patent number: 5320913Abstract: A conductive film consisting essentially of oxides of Ru and In.Type: GrantFiled: January 22, 1993Date of Patent: June 14, 1994Assignee: Asahi Glass Company Ltd.Inventors: Takeshi Morimoto, Kazuya Hiratsuka, Keiko Kubota, Satoshi Takemiya, Keisuke Abe, Takeshi Yoshizuka
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Patent number: 4767683Abstract: A non-aqueous electrochemical cell has an anode consisting of an element selected from the group consisting of lithium, sodium and aluminum; a cathode consisting of a porous carbon body and a current collector; and an electrolyte containing an oxyhalide, wherein the porous carbon body contains a carbon black having a structure wherein a thin layer of graphite crystals is formed on a surface of each of chain-like carbon black particles. The cell has a high discharge capacity and an excellent discharge efficiency in high rate discharge.Type: GrantFiled: December 7, 1987Date of Patent: August 30, 1988Assignees: Tokyo Shibaura Denki Kabushiki Kaisha, Toshiba Battery Co., Ltd.Inventors: Shuji Yamada, Takahisa Ohsaki, Kiyoshi Mitsuyasu, Yuichi Sato, Yoshiyasu Aoki, Kazuya Hiratsuka
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Patent number: 4757424Abstract: An electric double layer capacitor comprising a casing and polarizable electrodes and an electrolyte solution accommodated in the casing and utilizing an electric double layer formed by the interface of the electrolyte solution and the polarizable electrodes, characterized in that at least the portion of the casing which is in contact with the electrolyte solution at the anode side is made of an alloy steel consisting essentially of from 50 to 75.3% by weight of Fe, from 10.0 to 35.0% by weight of Cr, from 0 to 25.0% by weight of Ni, from 0.1 to 5.0% by weight of Mo and from 0.1 to 2.0% by weight of N.Type: GrantFiled: September 21, 1987Date of Patent: July 12, 1988Assignees: Asahi Glass Company Ltd., Elna Company Ltd.Inventors: Takeshi Morimoto, Kazuya Hiratsuka, Yasuhiro Sanada, Hiroshi Aruga
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Patent number: 4725926Abstract: An electric double layer capacitor utilizing an electric double layer formed by the interface of an electrolyte solution and polarizable electrodes, wherein the electrolyte solution comprises a quaternary phosphonium salt of the formula I dissolved in an organic solvent: ##STR1## wherein each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is a hydrogen atom, an alkyl group having from 1 to 15 carbon atoms or an aryl group having from 6 to 15 carbon atoms, provided that not all of R.sub.1 to R.sub.4 are hydrogen atoms, and X is BF.sub.4, PF.sub.6 , ClO.sub.4, AsF.sub.6, SbF.sub.6, AlCl.sub.4 or R.sub.f SO.sub.3 wherein R.sub.f is a fluoroalkyl group having from 1 to 8 carbon atoms.Type: GrantFiled: January 15, 1987Date of Patent: February 16, 1988Assignees: Asahi Glass Company Ltd., Elna Company Ltd.Inventors: Takeshi Morimoto, Kazuya Hiratsuka, Yasuhiro Sanada, Hiroshi Ariga
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Patent number: 4725927Abstract: An electric double layer capacitor utilizing an electric double layer formed by the interface of an electrolyte solution and polarizable electrodes, wherein the electrolyte solution comprises a solute dissolved in at least one solvent selected from the group consisting of sulfolane and a derivative thereof.Type: GrantFiled: April 8, 1987Date of Patent: February 16, 1988Assignees: Asahi Glass Company Ltd., Elna Company Ltd.Inventors: Takeshi Morimoto, Kazuya Hiratsuka, Yasuhiro Sanada, Hiroshi Aruga
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Patent number: 4702977Abstract: There is disclosed a secondary battery using a non-aqueous solvent which comprises using a carbonaceous material obtained by carbonating an organic compound and having a pseudographite structure of a hydrogen/carbon ratio being 0.15 or less, a d.sub.002 being 3.37 .ANG. or more and a Lc being 150 .ANG. or less as a negative electrode.The battery has a large electric density, less in self-discharging and excellent in preservability.Type: GrantFiled: April 24, 1986Date of Patent: October 27, 1987Assignees: Toshiba Battery Co., Ltd., Mitsubishi Petrochemical Co., Ltd.Inventors: Kazuya Hiratsuka, Yuichi Sato, Yoshiyasu Aoki, Hiroshi Yui, Mitsutaka Miyabayashi, Akira Itsubo